Milling-thread cutter.



D. DREIERu MILLING THREAD CUTTER.

-APPLIOATION FILED JULY 19, 1912.

Patented June 10, 1913.

2 SHEETS-SHEET 1.

Attorneys D. DREIER.

MILLING THREAD CUTTER.

APPLICATION FILED JULY 19, 1912.

g l gg Patented June 10, 1913 2 SHEETS SHEET 2.

, a W VVitnesseg Inventor 'NliE snares rare 1* came.

MILLING-THREAD CUTTER.

To all whom, it may concern s Be it known that I, DOMINICK DREIER, a citizen of the United States, residing at Livingston, in the county of Park and State of Montana, have invented a new and useful Milling-Thread Cutter, of which the following is a specification.

This invention relates to devices for cut ting and finishing threads on pipes. and the like and is more particularly designed as an improvement upon the structure disclosed in Patent No. 981,624, issued to me on January 17 1911.

One of the objects of the invention is to provide a die holder mounted for rotation within a stationary bearing ring, said ring carrying means coiiperating with the diev holder whereby said holder may be rotated at any desired speed.

Another object is to provide a milling tool having mechanism whereby it can be rotated at any speed desired about its individual axis and during the ,rotation of the die holder.

Another object is to provide improved means whereby the dies can be adjusted ferred form of the invention has been shown- In said drawings: Figure 1 is a front elevation of the tool. Fig. 2 is a side elevation thereof. Fig. 3 is a section on line A -B Fig. 1. Fig. 4.is a section on line OD Fig. 1, parts being broken away and said view being on an enlarged scale. Fig. 5 is a front elevation of the die holder and with the dies and their brackets removed. Fig. 6 is a face viewof the adjusting ring. Fig. 7 is a section on line EF Fig. 1, said section being taken through a portion of the structure. Fig. 8 is a perspective view of one of the dies and its bracket or slide. 9 is a detail view of the milling tool.

Referring to the figures by characters .of

Specification of Letters Patent. 7 Patented June 10, 1913. Application filed July 19, 1912. Serial No. 710,519.

reference 1 designates a bearing ring havof at diametrically opposed points and adapted to be engaged by suitable supports whereby the bearing ring will be held fixed. An cnduring the formation of threads. largeinent 3 is formed upon the periphery ing fingers 2 extending from one face thereof the bearing ring and has a drive shaft 4 journaled therein, said shaft having a large gear 5 and a small gear 6 secured to it, these gears being mounted for rotation with in a recess 7 formed in the bearing ring and directly back of the enlargement 3. One of the gears, 5, meshes with gear teeth extending throughout the length of one face of a ring 8 bearing upon one side of the fixed ring 1, the other face of the ring 8 being also provided with teeth, such as shown at 9, and which extend throughout the length of said face. Thus ring 8 constitutes'a two faced gear, the teeth on one face meshing with the gear 5 while the teeth on the other face are for the purpose hereinafter set forth. A. third ring 10 is provided and bears upon one face of the fixed ring 1,

this ring 10 being provided, on its inner face, with an annular series of teeth 11. Thus it will be seen that three rings are provided, the fixed ring 1 being interposed between the gear rings Sand 10.

A cylindrical die holder 12 is mounted for rotation within the three rings 1, 8, and 10 and is provided, at one end, with an annular flange 13 which laps the outer series of teeth 9. The other end of the holder 12 has an annular groove or channel 14 and mounted for rotation in this channel is an adjusting ring 15 having a spiral thread 16 upon its innermost face while'its outer face is provided with an outstanding annular flange 17. This flange serves to lap the ring 10 and hold it against, displacement relative to the ring 1. An inwardly directed flange 18 is formed within. the outer portion of the ring 15 and is lapped by a retaining ring 19 i which is secured in any suitable manner to the end of the die holder 12. Openings 20 are formed in the flange 17 of the adjusting ring 15 and are adapted to receive pins or the like whereby the said pin 15 can be rotated relative to the die holder 12.

That end of the die holder from which the flange 13 extends is dished or concaved and merges into the Wall of the central circular opening 22 of the die holder. Radially disposed channels 23 are formed in the confar ' 12 through which the gear t extends so as Wit dies hare been illtllfilt'etl at 2? and are S llffilrl operates tO"tlIlVG the ring}; in the oppoeaved end. oi toe die holder at ahout 120 do greos ape rt and the side Walls of these Clldl'l- RGlS overhon the spaces therehetweeri so as to lap and Main slides mounted in the channels one movable radially oi the die holder. Each of hose slides has it trans verse groove in its hack thee designed to receive it portion of the spiral thread 16, it being: understood that the channels open into the groove or channel let so that the slides are thus in position. to he ehgaged hy the thread 16.

Each of the slides 24 hes a yolre 26 at ts inner end carrying the tapered or trustw conical dies jourhaled therein, each die he ihgr provided with peripheral ribs, These lor tothose disclosed in my patent hereinbefore mentioned. A spring blade is preterehly connected to each yoke and is odapted to follow the die during the torrora tiori o t threads, the free end oi the blade heint; toothed as at 29 so as to clean out the grooves in "which the dies-trowel.

l oriiaed in the eorncaved ehdot' the die holder id at at point midway hetweeii two ol? the channels 23, is another radially disosed channel 39 similar to the channels and likewise communicatingwith the groove or oharmel it. it slide 31 is movohly mounted this channel 320 and has traitsrerse egroore tor the reoeotioh of a root tion eat the thread 16. it rolre 32 is formed at the inner end ot the slide jooroaled in "this yolre is shaft St to Whioh'ie secured o. triisto-oohical milling tool having}; oilmilar series of teeth outstanding therefrom. These teeth have been indicated at gear 37 it} eeoured to the shaft 3d and meshes with another gear 38 secured to or formed with a shaft 39* which is jiourooled iii an eor t0 extending outwardly from the slide 31. The tree end portion of this io angular in cross sectional contour and is slidahly mounted Within an oogolar ooseage 4-1 termed in a sleeve t2 which is joor. holed in a hraekot d3 outstanding from the die holder 12. it collar dd is seeored to the sleeve and serves to hold it against Withdrawal from the hearing hraolret and a gear t5 is secured to the outer end. oi the sleeve and meshes with theteeth 9 oil ring 8, there hei'og on opening to in the-holder to engage the ring 8. it desired, and as shown in hi 3, a Wear ring d7 may he intempered between the tired ring- 1 and the adiaeeot portion of the die holder 12.

to using the device l'iereihdeeerihed the 9 are eohrieoted to it; suitable eat portihg structure so as thus to hold ring 1 tired; Shaft t is then set in motion and the 5 thereoo will operate to drive the ring it in one dhreotioo While the other gear holder.

' site direction. As the die holder is fixedly connected, to the ring 10, preferably by moons of screws 4-8 or the like it will thus; be Seen that the (lie holder Will rotate with,-

in the fixed ring 1 so that the dies Will he caused to more around the stool: which extends through the openlng 22 in the die During; this rotationot the die holder, the rotating ring 8 transmits motion through its teeth 9 and the gear vo) 4h? and shaft 39 so that 38 thus operates to rotate gear 37 and shaft 3t and causes the milling tool35 to rotate. The teeth on the milling tool thus operate to out grooves into the stock and the haste-conical dies 27, which follow the milling tool, operate to tinish the grooves and thus oompleto the formation oi? the threads on the stoclr. The dies and milling tool'oon be easily adjusted. toward or away from the axis of rotation of the die holder, simply by rotating the adjusting ring; 10 so as to fcauoe the spiral thread 16 to simultaneously shift the slides 21 and 31 toward or from each other. changing the gears 5 and 6, the relative speed of rotation of the rings 8 and 10 can he varied desired.

What is claimed 1s:

1. lo a devioe of the class described, the combination with o die holder, and revoluhle dies mounted therein, of a revoluhle roilli g tool mounted Within the die holder, a shaft, and separate moons operated by the shaft tor simultaneously rotating the die holder and the milling tool about respective ares.

2. A. device ot the class described including .die holder, revoluhle dies therein and movable therewith, a milling tool Within the die holder, a drive shatt, separate means operated by the drive shaft for simultaneoosly rotating the die holder and the millihg tool about their individual axes, and means for simultoneoosly adjusting the milk ing" tool and the revoluhle die radially toward or from each other. l

3. it devioe of the class described including a die holder, said. holder having an annular groove, there being radial channels extending in the groove, slides mounted in the channels, revolublve dies carried by oertairr of the slides, a revoluhle milling tool carried hy the other slide, an adjusting ring mounted for rotation within the annular groove and having a spiral thread engaging j to sleeve carried .by the other slide, an. adjusting ring mounted for rotation within the annular groove and having a spiral thread engaging the slide.

- 5. A device of the class described including a die'holder, said holder having an annular groove, there being radial channels extending into the groove, slides mounted in the channels, revoluble dies carried by certain of the slides, a revoluble milling tool carried by the other slide, an adjusting ring mounted for rotation within the annular groove and having a spiral thread engaging the slide, a drive shaft, means operated thereby for rotating the die holder about'its axis, and additional means operated by the shaft for rotating the milling tool about its axis, said means including an extensible shaft permitting the adjustment of the milling tool radially within the die holder.

6., In a device of the class described the combination with a die holder and an annular toothed member secured to thedie tion on the die holder, a fixed ring extend ing around the die holder and between said annular toothed member and the toothedring, 'gearsmounted for rotation and engaging the toothed annular member and the toothed: ring respectively, .a telescopic shaft journaled upon the-die holder, a gear thereon meshing with the toothed ring, aslide connected to the die holder and adjustable radially, a revoluble milling tool carried by the slide, a gear revo'liible with said tool, and a gear revoluble withthe telescopic milling tool.

as my own, I have hereto afiixed ,my signature in the presence of two witnesses. I DOMINIGK DREIER; Y

Witnesses:

E; M. NILES, DOROTHY PoLsoN.

shaftand meshing with the gearou the 

